Answers for "centre an image bootstrap"

bootstrap 4 center image

/* used mx-auto d-block */

<img class="mx-auto d-block" src="https://www.w3schools.com/bootstrap4/paris.jpg" alt="https://www.w3schools.com/bootstrap4/paris.jpg"/>

css hot to center image in bootsrtap container

.center-block {
    display: block;
    margin-left: auto;
    margin-right: auto;
 }